Patient monitor User’s manual
Chapter 15-2
This is the Stroke Volume related to the body surface area (BSA).
Reference range: 35-65 ml/m2
The Cardiac Output is Stroke Volume multiplied by Heart Rate. It describes
the blood volume which the heart pumps during one minute.
Reference range: depends on BSA
TFC (Thoracic Fluid Content)
Thoracic Fluid Content reflects the electrical conductivity of the chest. The
amount of fluid in the chest affects the conductivity (or impedance) to the flow
of an electrical current through the chest. The more fluid, the higher the
conductivity and the higher the TFC value.
TFC can be used, for instance, to indicate the development of thoracic
oedema or to estimate the hydration state of the patient:
Reference range: male: 30…50 kΩ-1
female: 21…37 kΩ-1
SVR (Systemic Vascular Resistance)
SVR corresponds to SVRI but is not related to the body surface area:
Reference range: depends on BSA
Not every heart beat can be evaluated because of distortions or artefacts in
the signal.Mostly the artefacts are caused by the changes in venous blood
volume distribution due to movements of the patient. The software has an
algorithm for detecting such artefacts.Therefore, only the undistorted
waveforms are evaluated. The QI represents the percentage
of the evaluable heart beats.
DO2I (Oxygen Delivery Index)
Oxygen Delivery related to the body surface.
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